MIPS: Octeon: Support APPENDED_DTB

Use appended DTB when available.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11115/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index bd634259eab9d6b0f7d1b8e746d0b11c01f0950d..cd7101fb622705c26fa40bfd0f58ca4d23d05dcb 100644 (file)
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -1081,6 +1081,7 @@ void __init prom_free_prom_memory(void)
 
 int octeon_prune_device_tree(void);
 
+extern const char __appended_dtb;
 extern const char __dtb_octeon_3xxx_begin;
 extern const char __dtb_octeon_68xx_begin;
 void __init device_tree_init(void)
@@ -1088,11 +1089,19 @@ void __init device_tree_init(void)
        const void *fdt;
        bool do_prune;
 
+#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
+       if (!fdt_check_header(&__appended_dtb)) {
+               fdt = &__appended_dtb;
+               do_prune = false;
+               pr_info("Using appended Device Tree.\n");
+       } else
+#endif
        if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
                fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
                if (fdt_check_header(fdt))
                        panic("Corrupt Device Tree passed to kernel.");
                do_prune = false;
+               pr_info("Using passed Device Tree.\n");
        } else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
                fdt = &__dtb_octeon_68xx_begin;
                do_prune = true;
@@ -1106,8 +1115,6 @@ void __init device_tree_init(void)
        if (do_prune) {
                octeon_prune_device_tree();
                pr_info("Using internal Device Tree.\n");
-       } else {
-               pr_info("Using passed Device Tree.\n");
        }
        unflatten_and_copy_device_tree();
 }